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Posted on 12/08/2005 3:58:46 AM PST by TigerLikesRooster
"The last glacial maximum 18,000 to 23,000 years ago."
There were a number of major volcanic events from 28 kya to 22 kya, that appeared to cause a stepwise decrease in temperatures. The one for 22,000 years ago was Mt. Sakura-jima in Japan. It left a crater 15 miles in diameter, which is now a great bay with a much smaller volcano of the same name on one side. I would love to get time and size data on a few other possible major volcanic events for that period.
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| GGG managers are SunkenCiv, StayAt HomeMother & Ernest_at_the_Beach | |
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Just updating the GGG info, not sending a general distribution.12,400 years ago? Hydrologic cycle came to a screeching whoa for some reason, hmm, what could it have been?Evolution in Your FaceLake Victoria, Africa's largest lake, is home to more than 300 species of cichlids. These fish, which are popular in aquariums, are deep-bodied and have one nostril, rather than the usual two, on each side of the head. Seismic profiles and cores of the lake taken by a team headed by Thomas C. Johnson of the University of Minnesota, reveal that the lake dried up completely about 12,400 years ago. This means that the rate of speciation of cichlid fishes has been extremely rapid: something on average of one new species every 40 years! |
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